Rheological behavior of viscoelastic solutions formed by a cationic surfactant and organic salts
Viscoelastic solutions formed in the mixed aqueous solutions of 3-tetradecyloxy-2-hydroxypropyl trimethylammonium bromide (R14HTAB) and organic salts like sodium salicylate (NaSal) and sodium 3-hydroxynaphthalene-2-carboxylate (SHNC), were systematically studied by steady and dynamic shear rheologyin terms of concentration and temperature.In the absence of a salt,R14HTAB only produced spherical or short rod-like micelles in the concentration range of 100-400 mmol kg-1.The addition of aromatic salts induced micellar growth yielding wormlike micelles.Zero-shear viscosity of these solutions shows viscosity maxima behavior in the examined range of salt concentration,where the strongest and the most stable network structures were formed.The changes in the viscosities are a consequence of a change in the structural relaxation times, indicating that the flow behavior is mainly controlled by micellar kinetics.The microstructure of the wormlike micelles and the reason for the variation in the microstructure with increasing salt concentration has been analyzed by infrared and 1H NMR spectra measurements.The zero-shear viscosity decreases exponentially with increasing temperature.
Chuanhong Han Yan Guo Xiaoxiao Chen Qirui Zhang Xilian Wei
Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology,College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, P.R.China
国内会议
上海
英文
121-136
2016-04-27（万方平台首次上网日期，不代表论文的发表时间）